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sparc: Convert flash driver to OF device probing.

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Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-08-27 01:13:12 -07:00
parent 826b6cfcd5
commit a9540d3422
1 changed files with 51 additions and 81 deletions
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132
drivers/sbus/char/flash.c
View file

@ -1,5 +1,4 @@
/* $Id: flash.c,v 1.25 2001/12/21 04:56:16 davem Exp $
* flash.c: Allow mmap access to the OBP Flash, for OBP updates.
/* flash.c: Allow mmap access to the OBP Flash, for OBP updates.
*
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
*/
@ -15,13 +14,13 @@
#include <linux/smp_lock.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/sbus.h>
#include <asm/ebus.h>
#include <asm/upa.h>
static DEFINE_SPINLOCK(flash_lock);
@ -161,97 +160,68 @@ static const struct file_operations flash_fops = {
static struct miscdevice flash_dev = { FLASH_MINOR, "flash", &flash_fops };
static int __init flash_init(void)
static int __devinit flash_probe(struct of_device *op,
const struct of_device_id *match)
{
struct sbus_bus *sbus;
struct sbus_dev *sdev = NULL;
#ifdef CONFIG_PCI
struct linux_ebus *ebus;
struct linux_ebus_device *edev = NULL;
struct linux_prom_registers regs[2];
int len, nregs;
#endif
int err;
struct device_node *dp = op->node;
struct device_node *parent;
for_all_sbusdev(sdev, sbus) {
if (!strcmp(sdev->prom_name, "flashprom")) {
if (sdev->reg_addrs[0].phys_addr == sdev->reg_addrs[1].phys_addr) {
flash.read_base = ((unsigned long)sdev->reg_addrs[0].phys_addr) |
(((unsigned long)sdev->reg_addrs[0].which_io)<<32UL);
flash.read_size = sdev->reg_addrs[0].reg_size;
flash.write_base = flash.read_base;
flash.write_size = flash.read_size;
} else {
flash.read_base = ((unsigned long)sdev->reg_addrs[0].phys_addr) |
(((unsigned long)sdev->reg_addrs[0].which_io)<<32UL);
flash.read_size = sdev->reg_addrs[0].reg_size;
flash.write_base = ((unsigned long)sdev->reg_addrs[1].phys_addr) |
(((unsigned long)sdev->reg_addrs[1].which_io)<<32UL);
flash.write_size = sdev->reg_addrs[1].reg_size;
}
flash.busy = 0;
break;
}
}
if (!sdev) {
#ifdef CONFIG_PCI
const struct linux_prom_registers *ebus_regs;
parent = dp->parent;
for_each_ebus(ebus) {
for_each_ebusdev(edev, ebus) {
if (!strcmp(edev->prom_node->name, "flashprom"))
goto ebus_done;
}
}
ebus_done:
if (!edev)
return -ENODEV;
ebus_regs = of_get_property(edev->prom_node, "reg", &len);
if (!ebus_regs || (len % sizeof(regs[0])) != 0) {
printk("flash: Strange reg property size %d\n", len);
return -ENODEV;
}
nregs = len / sizeof(ebus_regs[0]);
flash.read_base = edev->resource[0].start;
flash.read_size = ebus_regs[0].reg_size;
if (nregs == 1) {
flash.write_base = edev->resource[0].start;
flash.write_size = ebus_regs[0].reg_size;
} else if (nregs == 2) {
flash.write_base = edev->resource[1].start;
flash.write_size = ebus_regs[1].reg_size;
} else {
printk("flash: Strange number of regs %d\n", nregs);
return -ENODEV;
}
flash.busy = 0;
#else
if (strcmp(parent->name, "sbus") &&
strcmp(parent->name, "sbi") &&
strcmp(parent->name, "ebus"))
return -ENODEV;
#endif
}
printk("OBP Flash: RD %lx[%lx] WR %lx[%lx]\n",
flash.read_base = op->resource[0].start;
flash.read_size = resource_size(&op->resource[0]);
if (op->resource[1].flags) {
flash.write_base = op->resource[1].start;
flash.write_size = resource_size(&op->resource[1]);
} else {
flash.write_base = op->resource[0].start;
flash.write_size = resource_size(&op->resource[0]);
}
flash.busy = 0;
printk(KERN_INFO "%s: OBP Flash, RD %lx[%lx] WR %lx[%lx]\n",
op->node->full_name,
flash.read_base, flash.read_size,
flash.write_base, flash.write_size);
err = misc_register(&flash_dev);
if (err) {
printk(KERN_ERR "flash: unable to get misc minor\n");
return err;
}
return misc_register(&flash_dev);
}
static int __devexit flash_remove(struct of_device *op)
{
misc_deregister(&flash_dev);
return 0;
}
static struct of_device_id flash_match[] = {
{
.name = "flashprom",
},
{},
};
MODULE_DEVICE_TABLE(of, flash_match);
static struct of_platform_driver flash_driver = {
.name = "flash",
.match_table = flash_match,
.probe = flash_probe,
.remove = __devexit_p(flash_remove),
};
static int __init flash_init(void)
{
return of_register_driver(&flash_driver, &of_bus_type);
}
static void __exit flash_cleanup(void)
{
misc_deregister(&flash_dev);
of_unregister_driver(&flash_driver);
}
module_init(flash_init);